F_iecSetDPI

This help function copies double point information to a byte variable. In the TwinCAT PLC the double point information occupies 2 bit of process data. In a byte variable, the information of up to 4 double points can therefore be mapped.

Syntax

FUNCTION F_iecSetDPI: BYTE
VAR_INPUT
    in      : BYTE;
    offset  : UDINT(0..3);
    eDPI    : E_IEC870_5_101DPI;
END_VAR

Inputs

in: Target variable into which the double point information is to be copied.

offset: Bit offset of the double point information.

eDPI: The new value of the double point information.

Sample in ST

The information of the four double points is set to ON.

PROGRAM MAIN
VAR
    memarea AT%M* : ARRAY[0..10] OF BYTE;
END_VAR

memarea[0] := F_iecSetDPI( memarea[0], 0, eIEC870_DPI_ON );
memarea[0] := F_iecSetDPI( memarea[0], 1, eIEC870_DPI_ON );
memarea[0] := F_iecSetDPI( memarea[0], 2, eIEC870_DPI_ON );
memarea[0] := F_iecSetDPI( memarea[0], 3, eIEC870_DPI_ON );

Requirements

Development environment	Target system type	PLC libraries to be linked (category group)
TwinCAT v3.1.4012.0	PC oder CX (x86, x64, Arm®)	Tc2_IEC60870_5_10x (Communication->IEC60870) Tc2_SerialCom (Communication->Serial) Tc2_TcpIp (Communication->TcpIp) Tc2_Utilities (System)